John Deere 4020 Parts for Repair and Restoration
Engine, hydraulic, transmission and sheet metal parts for the John Deere 4020, new, aftermarket and used, matched to your serial number range.
- Same-day shipping on in-stock parts (order by 2pm EST)
- Free shipping over $75
- Fit confirmed before you buy
About the John Deere 4020
The John Deere 4020 is one of the most popular tractors ever built, produced from 1963 to 1972 in Waterloo, Iowa. It has a six-cylinder engine in diesel, gasoline and LP versions, around 95 PTO horsepower, and either an 8-speed partially synchronized (Syncro-Range) or an 8-speed full Power Shift transmission. Thousands are still working on farms, and many are being restored.
John Deere 4020 Engine Parts
- Engine overhaul kits, pistons, sleeves and rings
- Cylinder head gaskets and full gasket sets
- Water pumps, radiators and thermostats
- Injection pumps and injectors (rebuilt), fuel filters and lift pumps
- Starters, alternators, generators and 12-volt conversion parts
John Deere 4020 Hydraulic and Transmission Parts
- Hydraulic pumps, pump seal kits and rockshaft parts
- SCV (selective control valve) parts and couplers
- Power Shift and Syncro-Range transmission parts, used assemblies and gears
- PTO parts, clutch packs and brake parts
4020 Sheet Metal and Restoration Parts
Hoods, grilles, fenders, fuel tanks, seats, steering wheels, gauges, light kits and decals for restoration or everyday use. For original sheet metal, used John Deere parts are often the best match.
Match Parts by 4020 Serial Number
The 4020 changed parts during its run, so the serial number matters. A new serial format began at 91000 in 1965, and the published ranges run from 65000 in 1964 to 260791 and up in 1972. See the full table in our guide on how to find your John Deere serial number. Parts no longer supplied new? See discontinued John Deere parts.
Ordering 4020 Parts
Have these ready when you call.
- Serial number from the tractor plate.
- Fuel type: diesel, gasoline or LP.
- Transmission: Syncro-Range or Power Shift.
- Working tractor or show restoration, so we suggest the right grade of part.
How to Order in 3 Steps
- Call +1 (833) 368-6811 with your tractor make, model and serial number (it is on the ID plate, usually on the dash, frame or transmission housing).
- Tell us the part or send the old part number. If you only have a photo or a description, that works too.
- Get your quote. We confirm fit, give you the price with no shipping surprises, and you pay through a secure payment link. In-stock parts ordered by 2pm EST ship the same day.
Shop by brand: John Deere • Kubota • New Holland • Massey Ferguson • Case IH • International Harvester • Ford 3000 • Farmtrac • Used & Aftermarket
Common Questions
The 4020 was produced from 1963 to 1972.
Check the serial number on the plate against the published ranges, for example 119000 to 145659 is 1966. Our serial number guide has the full table.
Yes. We source new, aftermarket and used Power Shift and Syncro-Range transmission parts and complete used assemblies.
Yes. Rebuilt injection pumps and injectors are often the best value for the 4020 diesel. Ask about core charges when you call.
In-stock parts ship the same day when you order before 2pm EST, Monday to Friday. Orders over $75 ship free within the contiguous 48 U.S. states.
Keep your 4020 working. Get the right part in one call.
John Deere is a trademark of Deere & Company. TractorPartOnline is an independent parts supplier and is not affiliated with or endorsed by Deere & Company. Model names and part numbers are used for identification only.